NON-HODGKINS-LYMPHOMA CAN MIMIC RENAL ADENOCARCINOMA WITH INFERIOR VENA-CAVAL INVOLVEMENT

Genitourinary involvement in both Hodgkin's and non-Hodgkin's lymphoma s is common and can be confused with other benign and malignant urolog ic conditions. While lymphoma commonly produces vascular and ureteral encasement, intraluminal vascular involvement is rare. Indeed, there a re no previous reports of renal lymphoma with tumor thrombus extending into both the renal vein and inferior vena cava. We describe the firs t reported case of lymphoma mimicking a Stage IIIA renal adenocarcinom a with tumor thrombus in the renal vein and the inferior vena cava. Re nal lymphoma should be considered in the differential diagnosis even w hen tumor thrombus is present in the renal vein or vena cava.